OhMyCalc

MTBF Calculator

Calculate Mean Time Between Failures (MTBF), MTBF in days, and failure rate from operational hours and number of failures.

How to Use the MTBF Calculator

  1. Enter total operational hours.
  2. Enter number of failures during that period.
  3. Click Calculate to get MTBF and failure rate.

حالات الاستخدام

الصيغة

MTBF = Total Operational Time / Number of Failures. Failure Rate = 1 / MTBF.

الأسئلة الشائعة

What is MTBF?
MTBF (Mean Time Between Failures) is the average time a system operates between failures. Higher MTBF means more reliable.
How is failure rate related to MTBF?
Failure rate = 1 / MTBF. A system with MTBF of 1000 hours has a failure rate of 0.001 failures/hour.
What is a good MTBF for servers?
Enterprise servers typically target MTBF of 100,000+ hours. Consumer hardware may be 50,000 hours.